69694B Waukesha Ignition Coil - VHP Gas Engine - Also Replaces Jenbacher 347257 - Epoxy-Filled Heavy Duty

Ignition Coil for Waukesha VHP & Jenbacher Gas Engines — Replaces 69694B / 347257

Keep your genset running. This is the heavy-duty, epoxy-filled ignition coil used in Waukesha VHP and Jenbacher Type 3/4 natural gas engines — the workhorses of the power generation and gas compression industry. Replaces Waukesha 69694B and Jenbacher 347257. Built for 24/7 continuous duty. Military-spec 3-pin connector.

The Problem

Your V12 or V16 gas engine runs 8,760 hours per year — non-stop. At those duty cycles, ignition coils are a wear item. When coils start to fail, you get misfires, detonation events, increased emissions, reduced power output, and eventually unplanned shutdowns. The OEM wants $350–$480 per coil, and your engine has 12 to 16 of them. A full set from the dealer costs $4,200–$7,680. That's an unacceptable maintenance cost on a part that's essentially a commodity.

The Solution

This is the same specification, heavy-duty ignition coil — epoxy-filled for vibration resistance and thermal stability, with a military-spec 3-pin connector for reliable contact in harsh environments. Direct replacement for Waukesha 69694B and Jenbacher 347257. Same performance, same reliability, dramatically lower cost. At $265 per coil, a full set of 16 costs $4,240 instead of $7,680 — saving you over $3,400.

Specifications

• Waukesha OEM Part Number: 69694B
• Jenbacher OEM Part Number: 347257
• Type: Ignition Coil — Epoxy-Filled, Heavy Duty
• Connector: 3-Pin Military Specification Connector
• Construction: Epoxy-filled for vibration resistance, moisture sealing, and thermal stability
• Duty Cycle: Rated for 24/7 continuous operation
• Condition: Brand New

Identification

• Visual ID: Epoxy-filled coil body (red or blue housing depending on generation)
• Connector: 3-pin military-spec connector on the lead end
• Location: One coil per cylinder — mounted on the valve cover or ignition harness rail
• Quantity Per Engine: 12 (V12 / L6) or 16 (V16) — plan your order accordingly

Compatible Engines

The 69694B / 347257 ignition coil fits the following gas engine platforms:

Waukesha Gas Engines (INNIO)

• Waukesha VHP L5790 Series (V12)
• Waukesha VHP L7042 Series (V16)
• Waukesha VHP P48 Series
• Waukesha VGF Series
• Waukesha APG Series (1000 kW+)

Jenbacher Gas Engines (INNIO)

• Jenbacher Type 3 (J312, J316, J320)
• Jenbacher Type 4 (J412, J416, J420)

Applications

• Natural Gas Power Generation (Continuous / Peak Shaving / CHP)
• Gas Compression Stations (Pipeline / Wellhead)
• Biogas / Landfill Gas Power Plants
• Oil & Gas Field Operations (Associated Gas)
• Industrial Cogeneration (Combined Heat & Power)

If your Waukesha or Jenbacher gas engine parts manual references 69694B or 347257, this is the correct ignition coil. These engines use one coil per cylinder — order 12 for V12/L6 engines or 16 for V16 engines.

Why Buy From Trenchwell?

• Massive Savings on Full Sets: The OEM charges $350–$480 per coil. A full V16 set from the dealer is $5,600–$7,680. From us, a set of 16 is $4,240 — saving you $1,360–$3,440 per engine, per maintenance cycle.
• Same Spec, Smarter Supply Chain: This is the same heavy-duty, epoxy-filled design rated for continuous 24/7 duty. Military-spec connector. Same reliability as the OEM-branded version.
• Volume & Fleet Pricing: Running multiple gensets? Contact us for volume pricing on sets of 12, 16, or multi-engine orders. We supply power plants, compressor stations, and fleet operators.
• Fast Shipping: In stock and ready to ship. Unplanned downtime on a 1000+ kW genset costs thousands per hour in lost revenue or penalty charges. We ship fast to get you back online.

Tune-Up Strategy

For maximum engine performance and longevity, we recommend replacing all coils at the same time alongside spark plugs:

• V12 Engine: 12 ignition coils + 12 spark plugs
• V16 Engine: 16 ignition coils + 16 spark plugs
• Replace all coils at the same interval — mixing old and new coils creates uneven firing and can cause detonation on the weaker cylinders
• Typical replacement interval: 4,000–8,000 operating hours (varies by fuel quality and load)
• Contact us for complete tune-up kit pricing (coils + plugs)

Installation Notes

• Shut down the engine and lock out/tag out per your site safety procedures
• Allow the engine to cool — coils operate at high temperatures
• Disconnect the 3-pin connector from the old coil
• Remove the coil mounting hardware and extract the coil
• Install the new coil in the same orientation — ensure the connector seats fully
• Torque mounting hardware to spec
• Reconnect the 3-pin military connector — verify positive engagement
• Repeat for all cylinders
• After installation, run the engine and perform a misfire check on each cylinder
• Log the installation date and hours for your maintenance tracking system

Frequently Asked Questions

Is this the same coil the OEM sells for $400+?
Yes. This is the same specification ignition coil — same epoxy-filled construction, same military-spec 3-pin connector, same performance rating for 24/7 continuous duty. The OEMs source these coils from specialist ignition manufacturers and re-brand them at dramatic markups. We offer the same spec coil at a fraction of the price.

Should I replace all the coils at once?
Absolutely. On a V16 running 8,000+ hours per year, all 16 coils experience the same thermal cycling and electrical stress. Replacing one at a time leads to uneven firing, increased misfire rates on the aging coils, and repeat maintenance visits. Replace the full set at your scheduled maintenance interval and pair them with new spark plugs for best results.

Does this fit both Waukesha and Jenbacher engines?
Yes. Waukesha 69694B and Jenbacher 347257 are cross-referenced — they specify the same ignition coil. Both engine lines are now manufactured by INNIO Group and share common ignition components across the VHP and Type 3/4 platforms.

How often should I replace the ignition coils?
Typical replacement interval is 4,000–8,000 operating hours, depending on fuel quality (pipeline natural gas vs. biogas/landfill gas), engine load factor, and operating environment. Engines running on biogas or low-quality gas will degrade coils faster. Monitor your misfire rates — increasing misfires are the leading indicator that coils are approaching end of life.

Do you offer complete tune-up kits?
Yes. Contact us for pricing on complete tune-up kits that include ignition coils and spark plugs for your specific engine configuration (V12 or V16). Buying as a kit saves additional money and ensures you have everything for a single maintenance event.